Self-feeding stay-bolt cutter.



R. HALL, JR. SELF FEEDING STAY BOLT CUTTER.

APPLICATION nun DBO. 26, 1912.

Roms/PT HALLJ/a INVENTOR ATTORNEY ROBERT HALL, me, or sPR-INGFI'ELL, ILLINOIS.

SELF-FEEDING sTAY-BoL'i' ceases.

Specification of Letters I atent.

Patented 0ct.28,1.913.

Application filed December 26, 1912. Serial No. 738,608.

To all whom it may concern:

Be it known that I, ROBERT HALL, Jr., a citizen of the United States, residing at Springfield, in the county of Sa-ngamon and State of Illinois, have invented new and useful Improvements in Self-Feeding Stay- Bolt Cutters, of which the following is a specification. a

My invention relates to improvements in self-feeding stay-bolt cutters of a type ilfiliitpted to be driven by an air motor, or the The object of my invention is to provide a device of the class described which will be simple in construction and so arranged that it may be readily, quickly and easily placed over a stay-bolt and operated to cut oif the bolt at any desired distance from the end.

My invention consists in certain details, in the construction, arrangement and combination, of the various parts of the device, whereby the above objects contemplated are attained, as hereinafter more fully set forth, pointed out in the claims, and illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal sectional view of the device of my invention, shown in connection with an air motor adapted to drive the same. Fig. 2 is a plan view of the housing about the shaft adjusting device, carried on the upper side of an air motor. the shaft handle being removed. Fig. 3 is a detail view of the adjusting block. Fig. at is a view of the under side of the bolt cutter.

Referring to the accompanying drawings, I have used the reference letter A to indicate the air motor by which. in the preferred embodiment of my invention, the device is driven.

1 designates a revolving chuck, driven by the air motor, through which passes a nonrevolving slidable shaft 2. On the lower end of shaft 2 is an enlarged cylindrical head 3, having a square socket 4: therein.

5 designates a tubular casing having its upper portion threaded on to chuck 1, and being further secured thereto by screws 6. Head 3 of shaft 2 is adapted to slide up and down in casing 5, head 3 being slidably fitted in guide cylinder 27. Slot 7 is provided in casing 5, in which cutter holder 8 is adapted to move, cutter holder 8 being held therein by fulcrum pin 9. Spring 10 is attached on each side of slot 7, and extends into said Slot and engages e upper",

end of cutter holder 8, being adapted to press cutter holder 8 inward at this point.

11 indicates screws by which spring 10 is attached to' casing 5. w 7

1'2 designates a cutter blade fitted into an opening in the lower end of cutter holder 8, being held in place therein by set screw 13.

14c designates a feed-cone which is slidably mounted upon shaft 2, having a key 17 mounted therein adapted to slide in key-way 16 of shaft2. Threads 15 on feed-cone 14: are adapted to mesh with threads 15 on the innerside of easing 5;

In order to provide adjustment so that the device of my invention may be used on severalsize bolts, adjusting blocks 19, adapted tosl'ide in slots 19', are provided. Aldjusting blocks; 19 are provided with roller bear- 18 which extend inward beyond the inner faceso'f the adjusting blocks.

20' indicates an adjusting screw fitted into hole 20, having apin 28 adapted to fit in slotted hole 29 in casing 5'. Head 30 is pro vided on the inner end of pin 28. Hole 20 is not provided with threads to engage with adjusting screw 20, but threads are provided in block 19. It will be readily seen that block 19 will be easily drawn back and forth by the rotation of adjusting screw 20, head 30 preventing the backwardor forward movement of the adjusting screw. Block 19 is provided with keys 31 adapting said block to slide back and forth in key-ways 31 and 31. In order to adjust the position of slot 4 in head 3 of shaft 2, a shaft adjusting device is provided.

21 indicates a handle attached to the upper end of shaft'2 by screw 23. The length of shaft 2 is such that it will protrude through the air motor when head 3 is in its lowest practical position, making it advantageous to provide the shaft adjusting device on the upper side of the. air motor. A gear wheel at is slidably mounted about shaft 2, having a key 17 mounted therein and adapted to slide in key-way 16 of the shaft. A'housing'22 fitsover gear wheel 24 and holds the same'in place against the upper side of air motor, A. A pin 25 is provided which slides in housing 22 and is adapted to engage with the teeth on gear wheel 24. 'Coil spring. 26 is adapted to.

force pin 25 inward. When it is desired to revolve shaft 16, pin- 25 is drawn outward releasing the teeth on gear 24: and allowing the shaft to be adjusted as desired.

In bringing the device of my invention into operation casing 5 is fitted about the stay-bolt, and shaft 2 is fed down through cylindrical opening 27 until the head of the bolt is loosely fitted into socket l. Adjusting blocks 19 are then adjusted to suit the size of the stay-bolt and the air motor is thrown into revolution. It will be readily seen that when chuck 1 in connection with the air motor begins to revolve, feed-cone 14: will be fed downward by threads 15 on the inner side of easing 5. As feed-cone It moves downward the upper end of cutter holder 8 will be moved outward, the cutter holder being revolved about fulcrum pin 9. This movement of cutter holder 8 will throw cutter 12 inward, cutter 12 cutting into the stay-bolt by reason of the revolution of the entire device about shaft 2. When the staybolt is cut sufiiciently, the air motor is re versed and feedcone 14 is drawn upward to its normal position and cutter 12 is likewise drawn back by the action of spring 10. It will be understood that it is only necessary to cut a groove about a stay-bolt, in the process of cutting the same in two, and a hammer blow is then necessary to break off the bolt at the groove made by the cutter.

From the foregoing description it will be seen that the device of my invention provides a self-feeding stay-bolt cutter which will be simple in construction and speedy and effective in its operation.

I wish it to be understood that changes within the spirit and scope of the appended claims may be made, as it is obvious that the arrangement of parts and details of construction may be varied in many ways.

Having thus described my invention, what I claim is 1. The combination with an air motor, or similar actuating appliance, of a shaft memher having a longitudinally extending keyway therein, said shaft having an enlarged head on the lower end thereof provided with a socket, a casing member, a feed-cone member, a cutter holder member, a cutter member, adjusting blocks, adjusting screws, a cutter holder spring, and a shaft adjusting device.

2. T he combination with an air motor, or similar actuating appliance, of a shaft member, a casing member attached to the chuck of the air motor, said casing being provided with a longitudinally extending slot through its wall for the reception of a cutter, said casing carrying threads on its inner wall adapted to mesh with threads carried on a feedcone, a feed-cone member, a cutter holder member, a cutter member, adjusting blocks, adjusting screws, a cutter holder spring, and a shaft adjusting device.

3. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member provided with a guide cylinder, said casing member being provided with adjusting blocks and adjusting means for said adjusting blocks, a feed-cone member, a cutter holder member, and a shaft adjusting device.

4. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member, a feed-cone member slidably mounted upon a shaft member and provided with a key adapted to slide in a. key-Way carried by a shaft member, a cutter holder, a cutter member, adjusting blocks, and a shaft adjusting device, substantially as described.

5. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member, a feed-cone member slidably mounted upon a shaft member, said feed-cone provided with threads adapted to mesh with threads carried by a casing member, a cutter holder member, a cutter member, adjusting blocks, adjusting screws, a cutter holder spring, and a shaft adjusting device.

.6. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member, a feed-cone member, a cutter holder carried in a slot in a casing member and having an actuating portion adapted to contact with a feed-cone, said cutter holder being mounted in a slot in a casing member on a fulcrum pin carried by said casing member, a cutter holder spring, a cutter member, adjusting blocks, adjusting screws and a shaft adjusting device.

7. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member, a feed-cone member, a cutter holder member, a cutter member carried by a cutter holder, adjusting blocks, adjusting screws, a cutter holder spring, and a shaft adjusting device.

8. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member, a feed-cone member, a cutter holder member, a cutter member, adjusting blocks carrying roller members and slidably mounted in a casing member, adjusting screws, a cutter holder spring, and a shaft adjusting device.

9. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member, a feed-cone member, a cutter holder member, a cutter member, adjusting blocks, adjusting screws carried by a casing member and adapted to mesh with threads carried by adjusting blocks, said adjusting screws having necked portions adapted to fit in slotted openings in a casing, a cutter holder spring, and a shaft adjusting device.

10. The combination with an air motor, or similar actuating appliance, of a shaft member, a casing member, a feed-cone member, a cutter holder member, a cutter member, adjusting blocks, adjusting screws, a

cutter holder spring carried by a casing cutter holder spring, a shaft adjusting de member and adapted to force the actuating vice comprising a housing, a gear Wheel end of a cutter holder against a feed-cone slidably keyed to and at right angles to a member, and a shaft adjusting device, subshaft, and a pin and spring adapted to allow 5 stantially as described. the manual rotation of said shaft and gear 15 11. The combination with an air motor, Wheel, substantially as described. or similar actuating appliance, of a shaft ROBERT HALL, JR. member, a casing member, a feed-cone mem- Vitnesses: ber, a cutter holder member, a cutter mem- H. W. SILLOWAY, l0 ber, adjusting blocks, adjusting screws, a SARAH SCHWARTZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

